Immobilized white-rot fungus and its application for composting garbage

Abstract

The present invention relates to the utilization of microbial immobilizing technology in treating city domestic garbage. Immobilized microbial preparation is prepared with corn cob as carrier to immobilize whiterot fungus, immobilized whiterot fungus is then inoculated activity raising culture medium for culturing of 4-6 days and immobilized fungal preparation is prepared via filtering to eliminate culture liquid. The immobilized fungal preparation is used in treating garbage via inoculation while the compost material has its temperature lowered to 40 deg.c or so, regulating the water content in compost, controlling the ventilation rate and turning the compost timely for thorough decomposition. By utilizing whiterot fungus with high lignin degrading enzyme yield and high heavy metal adsorbing and fixing ability and the immobilizing technology to reduce heavy metal in compost, the present invention can raise the quality of compost greatly.

Description

Technical field: [0001] The invention relates to the composting treatment of solid wastes, in particular to the treatment of municipal domestic wastes by using microorganism immobilization technology. Background technique: [0002] The traditional composting method is to use the indigenous microorganisms in the compost to decompose the organic matter in the garbage. However, due to the weak activity and low degradation ability of the indigenous microorganisms, urban garbage often contains a large amount of lignin biodegradable substances, resulting in long composting time and low fertilizer efficiency. Low. However, the poor composting effect, insufficient maturity of composted products, and the potential hazards of heavy metal accumulation caused by composting are all limiting factors for the large-scale development of composting technology today. At present, a lot of research has been done on the optimization of the composting process in China, and a lot of manpower and m...

AI Technical Summary

Problems solved by technology

[0004] However, the lignin degrading enzyme system of white rot fungi exists in the extracellular environment, and the mechanical shear force generated by stirring and oxygenation measures commonly used to improve the efficiency of the reaction system will destroy and affect the structure and activity of the enzyme, thereby affecting the white rot fungus. Degradation of lignin by saprophytes

At the same time, although white rot fungi can effectively adsorb heavy metals, they cannot effectively separate free white rot fungi from the stockpile, so that the total amount of heavy metals cannot be significantly reduced after composting

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